feat(openresty): add origin error page GET-only option

Allow restricting custom origin error HTML to GET requests so other
methods pass through origin responses. Adds option seed, snapshot field,
edge limit_except/Lua handling, and admin UI switch.

internal/apps/openflare/config_version/logics.go

@@ -537,6 +537,7 @@ func diffOpenRestyOptionDetails(left openRestyConfigSnapshot, right openRestyCon
 	appendIfChanged("OriginErrorPageEnabled", fmt.Sprintf("%t", left.OriginErrorPageEnabled), fmt.Sprintf("%t", right.OriginErrorPageEnabled))
 	appendIfChanged("OriginErrorPageStatusCodes", encodeOriginErrorPageStatusCodes(left.OriginErrorPageStatusCodes), encodeOriginErrorPageStatusCodes(right.OriginErrorPageStatusCodes))
 	appendIfChanged("OriginErrorPageHTML", left.OriginErrorPageHTML, right.OriginErrorPageHTML)
+	appendIfChanged("OriginErrorPageGetOnly", fmt.Sprintf("%t", left.OriginErrorPageGetOnly), fmt.Sprintf("%t", right.OriginErrorPageGetOnly))
 	return changes
 }
 
@@ -603,5 +604,6 @@ func openRestyOptionKeys() []string {
 		"OriginErrorPageEnabled",
 		"OriginErrorPageStatusCodes",
 		"OriginErrorPageHTML",
+		"OriginErrorPageGetOnly",
 	}
 }

internal/apps/openflare/config_version/snapshot.go

@@ -143,6 +143,7 @@ type openRestyConfigSnapshot struct {
 	OriginErrorPageEnabled     bool     `json:"origin_error_page_enabled"`
 	OriginErrorPageStatusCodes []string `json:"origin_error_page_status_codes,omitempty"`
 	OriginErrorPageHTML        string   `json:"origin_error_page_html,omitempty"`
+	OriginErrorPageGetOnly     bool     `json:"origin_error_page_get_only,omitempty"`
 }
 
 type snapshotDocument struct {
@@ -558,6 +559,7 @@ func buildOpenRestyConfigSnapshot(ctx context.Context) openRestyConfigSnapshot {
 		OriginErrorPageEnabled:     getBoolConfig(model.ConfigKeyOriginErrorPageEnabled, true),
 		OriginErrorPageStatusCodes: parseOriginErrorPageStatusCodes(getStringConfig(model.ConfigKeyOriginErrorPageStatusCodes, `["500-599"]`)),
 		OriginErrorPageHTML:        getStringConfig(model.ConfigKeyOriginErrorPageHTML, ""),
+		OriginErrorPageGetOnly:     getBoolConfig(model.ConfigKeyOriginErrorPageGetOnly, false),
 	}
 	if snapshot.DefaultLimitRate == "0" {
 		snapshot.DefaultLimitRate = ""

internal/apps/openflare/option/openresty_validators.go

@@ -61,6 +61,7 @@ var openRestyOptionValidators = map[string]func(key, value string) error{
 	model.ConfigKeyOriginErrorPageEnabled:                validateBooleanOption,
 	model.ConfigKeyOriginErrorPageStatusCodes:            validateOriginErrorPageStatusCodes,
 	model.ConfigKeyOriginErrorPageHTML:                   validateOriginErrorPageHTML,
+	model.ConfigKeyOriginErrorPageGetOnly:                validateBooleanOption,
 }
 
 var openRestyDefaultLimitRatePattern = regexp.MustCompile(`^\d+[kKmM]?$`)

internal/infra/persistence/migrator/goose/postgres/202608060002_add_origin_error_page_get_only.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+INSERT INTO w_system_configs (key, value, type, visibility, description, created_at, updated_at)
+VALUES
+  ('origin_error_page_get_only', 'false', 'business', 0, '源站错误页是否仅对 GET 请求生效（其它方法透传）', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+ON CONFLICT (key) DO NOTHING;
+
+-- +goose Down
+DELETE FROM w_system_configs WHERE key = 'origin_error_page_get_only';

internal/infra/persistence/migrator/goose/sqlite/202608060002_add_origin_error_page_get_only.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+INSERT INTO w_system_configs (key, value, type, visibility, description, created_at, updated_at)
+VALUES
+  ('origin_error_page_get_only', 'false', 'business', 0, '源站错误页是否仅对 GET 请求生效（其它方法透传）', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+ON CONFLICT (key) DO NOTHING;
+
+-- +goose Down
+DELETE FROM w_system_configs WHERE key = 'origin_error_page_get_only';

internal/model/system_configs.go

@@ -114,6 +114,7 @@ const (
 	ConfigKeyOriginErrorPageEnabled     = "origin_error_page_enabled"      // 是否启用源站错误页
 	ConfigKeyOriginErrorPageStatusCodes = "origin_error_page_status_codes" // 源站错误页触发状态码标签 JSON 数组
 	ConfigKeyOriginErrorPageHTML        = "origin_error_page_html"         // 源站错误页自定义 HTML（空则内置默认）
+	ConfigKeyOriginErrorPageGetOnly     = "origin_error_page_get_only"     // 是否仅对 GET 请求返回自定义错误页
 )
 
 const (